Beiträge zur Chemie der Flechtengattung Lasallia Mérat / On the Chemistry of the Lichen Genus Lasallia Merat

Abstract

The secondary product patterns of eleven Lasallia-species, L. asiae-orientalis Asah., L. brigantium (Zsch.) Llano, L. capensis (Frey) Llano, L. hispanica (Frey) Sancho & Crespo, L. membranacea (Laur.) Llano, L. papulosa (Ach.) Llano , L. pensylvanica (Hoffm.) Llano, L. pertusa (Rass.) L lano, L. pustulata (L.) Merat, L. rossica Dombr. und L. sinensis Vej are investigated by hplc. In addition to gyrophoric acid, lecanoric acid, umbilicaric acid, 7-chloroemodin, valsarin and skyrin, which were described before, hiascic acid and ovoic acid were found by means of hplc-cochromatography , UV -and mass spectrometry and the reac­tion of hiascic acid with acetone. The secondary product pattern of Lasallia-species is useful for systematic purposes. A key of the species is provided. The distribution of secondary prod­ucts within the thalli is discussed.

Studies on the Chemistry of the Lichen Genus Umbilicaria Hoffm.

“…It is unav o id ab le to use acetone as extraction solvent th o u g h acetone reacts w ith hiascic acid to give hiascic acid acetale [28]. M eth an o l, w hich could be used alternatively because o f the good solubility o f lichen substances, can n o t be used here because m eth an o l reacts w ith depsides durin g the extraction period.…”